Wait for passwd to exit.

ticdesk_account/views.py

@@ -69,6 +69,9 @@ def change_password(request):
                 # Confirm new password prompt from pam_krb5
                 child.expect('[Rr]etype new [Kk]erberos [Pp]assword: ')
                 child.sendline(chpw_form.cleaned_data['password_new'])
+                # Wait for the child to exit
+                child.expect('passwd: password updated successfully')
+                child.wait()
 
                 # Try new password
                 ret = pam().authenticate(request.user.username,